Salt
The density of water is 1.0 and people are made mostly of water but they do float in water (just) so the density of a person is lust less than 1.0. I can not give you a precise answer because of cause your density would change as you breath in and out.
No, your density does not change when you are in water. Your density is determined by your mass and volume, and it remains constant regardless of the medium you are in.
If the density of surface water in a lake does not change, then the water at the surface will maintain its relative position compared to the denser water beneath it. This will result in stable stratification, with the surface water layer remaining on top and the denser water layer staying below.
To calculate the water difference when the density changes, you would need to account for the change in volume due to the density change. Use the formula: Difference in water volume = Original water volume / Original water density - Original water volume / New water density. Multiply this difference in volume by the new water density to obtain the actual water difference.
No.
No, pouring out some water from a bucket does not change the density of the water remaining in the bucket. Density is a physical property of a substance that remains constant regardless of the amount of that substance present.
Density = mass / volume. So if the volume changes, the density will obviously also change.
The density of water increase after evaporation.
no
yes. the density of a element will not change only the mass and volume will.
The density of the water increases.
The only way to change the mass of water would be to either add more of it (which wouldn't change it's density - density is an intensive property, not extensive) or to change the isotopes of hydrogen and oxygen in the water - thus getting "heavy water" such as is present as an intermediate materiel in the refining of tritium and as a moderator in some nuclear reactors.